Hammer mill



July 23, 1935. R.- SHERMAN HAMMER MILL Filed Oct. 3, 1932 Patented July 23, 1935 HAMMER. MILL Ralph L. Sherman, Downers Grove, 11]., asslgnor to The Myers-Sherman Company, Chicago, 111.,

a corporation of Ohio Application October 3,

' Claims.

This invention relates to hammer mills in general and particularly to a chute or trough into which materials to be ground by the hammer mill machine are fed to proper position.

5 The primary object of the invention is to provide a new and improved removably and adjustably mounted chute for hammer mills.

A further object is to provide a hammer mill which has an opening at the upper part thereof,

one side of the opening being defined by an arcuate portion of the casing; which has a chute or trough supported by said arcuate portion and adjustably connected to said arcuate portion whereby the opening may be increased or diminished depending upon the kind of material fed into the machine.

A further object of the invention is to provide a hammer mill which has a feed opening arranged in a particular position; which has a chute adjustably mounted for the purpose of causing the material fed into the hammer mill to be deposited in a particular position relative to the hammer mill mechanism, and which is provided with means whereby the chute may be arranged in various positions to vary the size of the opening depending upon the kind of material fed into the machine.

Numerous other objects and advantages will be apparent throughout the progress of the following specification.

The accompanying drawing illustrates a selected embodiment of the invention and the views therein are as follows:

Fig. 1 is a detail perspective view of a hammer mill having the improved removable and adjustably mounted chute or trough mounted thereon.

Fig. 2 is a detail sectional view on the line 22 of Fig. 1.

Fig. 3.is a detail sectional view on the line 3-3 L0 of Fig. 2.

The hammer mill comprises a transverse shaft 5 which is supported in bearings or journals 6 operatively fixed to the hammer mill casing I. A pulley 8 is fixed to one end of the shaft and has ,5 a belt or other member 9 wrapped therearound and driven by a prime mover, such as a gasoline motor.

III are arranged inside of the casing i and carry a plurality of circumferentially arranged piv- 0 otally mounted hammers ii.

A fan or blower I2 is operatively connected to the opposite end of the shaft 5 and is driven by said shaft. The fan or blower is encased in a casing l3, and a pipe I4 is operatively connected 5 to the casing l3 and leads to a hopper l5 of the cyclone type. 'I'he front part of the casing I is curved as indicated at l6 and extends inwardly to a point designated at H. The edge l1 of the front part of the casing is spaced from the upper 0 edge l8 of the curved rear face I 9 of the casing.

A plurality of spaced circular members 1932, Serial No. 635,981

The space between the point I! and the edge I8 forms an opening which, for the purpose of convenience, will be termed the, feed opening as it is through this opening that the material to be ground, chopped or pulverized is fed into posi- 5 tion into the machine. The material which passes into the opening 20 is ground or chopped up by the centrifugal action of the hammers H which material, when ground or chopped up, falls through the bottom 2| and is depositedinto the receptacle 22 where it is deposited in the hopper I 5, there being a member 23 operatively connected to the receptacle 22 and the fan l2. A chute or trough 24 is provided for feeding material into the hammer mill. This chute comprises a relatively U-shaped feed portion 25 having an apron 26 connected thereto, the chute being graduated in size, being relatively low at the far end as indicated at 21 and being relatively high at its inner end as designated. at 28. The inner end of the chute has an arcuate depending portion 29, Fig. 2, which is pivoted-to the end of the chute as indicated at 30. This arcuate member is formed to conform with the arcuate shape of the curved portion it of the casing and is adapted to slide on said curved portion for the purpose of adjusting the chute relative to the hammer mill. The arcuate portion 29 is provided with spaced cross ribs 3| which are struck from the sheet metal portion 29. A roller 32 is revolubly supported in the side portions of the frame l and engages the upper'or outer face of the member 29 to hold I, this latter member against the curve portion it. This roller is arranged between the ribs 35 and limits the slidable movement of the member as when the roller is engaged by the ribs. The purpose of adjustably mounting the chute is to vary the size of the feed opening 20. When the chute is in the position shown in solid lines in Fig. 2, the opening 20 is relatively large, but when it is moved to the position indicated in dotted lines, the size of the opening will be materially reduced. Another reason for making this chute adjustable is to permit the chute to be inclined, if desired. The chute is supported by a pair of bars 33 which carry a pivot pin 34 at their upper ends, the pivot pin 34 operating in a slot 35 provided in a member 36 which is fixed to the chute. The rods or supports 33 are pivotally supported by a cross member or rod 31 which is revolubly supported by 50 the members 38 and 38' fixed to the casing I.

A feed shutter 39 may be suitably mounted so that it will extend inside of the chute. This member 39 comprises a face 40 having an opening 4| through which the material being fed to the hammer mill passes. Arms 42 are fixed to the member 40 and are pivotally supported on a cross rodl3, Fig. 2. In order to varythe size of the opening ll, a slidable plate 44 is provided. This plate is provided with a slot 45 through which a pin mounted, on the mem- A fly 48 is pivotally supported on the rod 43 for the purpose of preventing any'meal or dust from passing through the opening 20.

' openings 20 and ll be as large as possible. If

The purpose of making the chute adjustable is to'not only vary the size of the opening 20 but to feed the material to a predetermined position relative to the axial center line of the hammer mill itself, it-being preferable in some instances tofeed the material slightly to the right side, Fig. 2, of the shaft 5 and sometimes ;to the left side of theshaft 5 depending upon the materialto be acted upon. When materials like corn, oats, and other grain are fed into the hammer mill, it is desirable to reduce the sizes of the openings 20 and 4| so that too much material is not'fed into the hammer mill at one time. When morebulky material, such as hay, is fed into the machine, it is desirable that the an opening larger than the full size of the opening ll is required, the entire plate, 40 and its cooperating parts may be removed. Also, it may be desirable to feed bulky material, such as hay, into a different position relative to the center line of the hammer mill. Thus, by making the chute adjustable relative to the feed opening and providing' an adjustable opening within the confines of the chute, materials of various kinds ranging from the finer grains to bulky material, such as hay, may be acted upon with facility;-

The plate 29, as previously mentioned, is slidably mounted on the face l6v of the casing and the plate 29, along with the chute 24, is moved upwardly and downwardly relative to the arcuate face i6 so as to vary the size of the opening 20. This slidable movement of the plate 29 and the chute 24 is accomplished by mechanism 50 which comprises a clevis-shaped member 5| having spaced legs '52, the member 5| being provided with a central opening through which the rod 31 passes and is maintained in fixed position on this rod by means of a set screw 53. A link 54 extends between the spaced legs 52 and is pivotally connected thereto, as indicated at.55, Fig. 2. The upper end of the link 54 is pivoted-at 56 to a. pair of spaced angle members 51. The spaced angle members 51 are welded or otherwise fixed to the plate or arcuate depending portion 29.

An operating handle 58 is fixed to the rod 31' for the purpose of operating the mechanism 50. When it is desired to move the plate 29 and the chute 24- to vary the size of the opening 20, the handle 58 is operated. The handle 58 being fixed to the rod 31, will rotate or oscillate this rod depending upon the movement of the handle 58. When the rod 31 is rotatively moved, the

- member 5l will likewise move, pulling on the .link 5| which is attached to the plate or memthe handle is raised to move the member 29 to the position indicated in dotted lines in Fig. 2,

the protuberance or cross rib 3| will be in engagenient with the rod or roller 32. Thecross bar or roller 32 is preferably removably supported in position so that after its removal, the plateor depending portion 29 may be removed merely by disconnecting the link 54 from either the member II or the supportingangles B1.

The invention provides a hammer mill having a chute support adjustable relative to the hammer' mill to cause. the materials to be fed into the hammer mill at a predetermined position and to feed a predetermined amount of material.

The chute -is also adjustable to vary the angle of inclination, as desired.

Changes may be made in the form, construction, and arrangement of the parts without departing from the spirit of the invention or sacri-- ficing any of its advantages, and the right is hereby reserved tomake all such changes as fairly fall within the scope of the following otally connected to said member and to a part of said casing .for moving said member and said chute relative to the opening, said means comprising a cross bar fixed to the casing, a handle fixed to the cross bar, and linkage connecting the cross bar and the member whereby rotative movement of the cross bar upon moving the handle will cause slidable movement of the arcuate member relative to the arcuate casing.

2. A hammer mill comprising a casing having a feed opening. therein, a member slidably fastened to said casing adjacent the opening to vary the size of said opening, a chute pivotally connected to said member, and means for shifting said chute to move said member and thereby vary the size of said feed opening.

3. A hammer mill comprising a casing having a feed opening therein, a chute arranged in position to feed into said opening, said chute having a member fastened thereto slidably engaging the casing adjacent the feed opening whereby adjustment of the chute will move the member in respect to the opening and vary the size of the feed opening.

,4. A hammer mill comprising a casing havi g a feed opening therein, a chute adapted to inclined in position to feed into said openin said chute having a member fastened thereto slidably engaging the casing adjacent the feed,

opening whereby the chute may be adjusted to vary the size of the feed opening, and means for adjusting the inclined angularity of the chute.

5. A hammer mill comprising a casing having ai'eed opening therein, a chute adapted to be inclined in position to feed into said opening, said chute having a member fastened thereto slidably engaging the casing adjacent the feed opening whereby the chute may be adjusted to-vary'the size of the feed opening, means for adjusting the inclined angularity of the chute, and additional means carried by the chute to reduce the feeding cross sectional opening thereof. ,so that the amount of material carried by the chute may be varied.

L. SHERMAN. 

